Abstract: A continuous process for dyeing a carpet in which spaced regions of the tufted side of a pre-wetted carpet are first compressed in a desired pattern. The tufted surface is then covered with a viscous water-soluble gum, and drops of a less viscous gum are then applied to the viscous gum-wetted tufts. Next, drops of a viscous dye are applied to the tufted surfaces and then a less viscous dye is applied over the entire tufted surface of the carpet.

Abstract: A continuous process for dyeing a pre-wetted carpet includes the step of printing, in one dye color, a desired pattern on the tufts, compressing those of the tufts receiving the dye in the process. The tufted printed surface of the carpet is then covered with a viscous water-soluble gum and then drops of a second dye, which is less viscous than the gum, are applied to the viscous gum-wetted tufts. Then a third dye which is substantially less viscous than the second dye is applied over the entire tufted surface of the carpet.

Abstract: A continuous process for dyeing a pre-wetted carpet includes the step of applying a viscous water soluble gum layer over the tufted face of the carpet. Drops of first and second dyes less viscous than the gum are applied over the gum-wetted carpet face. A third dye which is substantially less viscous than the gum and the first and second dyes is applied over the entire tufted surface of the carpet.

Abstract: An infrared charge-coupled-device (IR-CCD) imager uses an array of Schottky-barrier diodes (SBD's) as photosensing elements and uses a charge-coupled-device (CCD) for arranging charge samples supplied in parallel from the array of SBD's into a succession of serially supplied output signal samples. Its sensitivity to infrared (IR) is improved by placing bias charges on the Schottky barrier diodes. Bias charges are transported to the Schottky barrier diodes by a CCD also used for charge sample read-out.

Abstract: A line-transfer charge-coupled-device (CCD) imager has an image register from which lines of charge packets representing image samples are removed via a plurality of charge funnels. Each charge funnel is a CCD transmission line, wide enough at its input port to connect across the parallelled output ports of a plurality of the parallelled charge transfer channels in the image register of the line-transfer CCD imager, and narrower at its output port which connects to a charge sensing stage. Power for clocking the plurality of charge funnels is conserved when, in accordance with the invention, each of the charge funnels is dynamically clocked for time intervals when charge packets descriptive of image samples are transferred through the charge funnel. The charge funnels receive static clocking voltages at other times.

Abstract: In an A/D converter, a resistive network for producing 2.sup.n different voltage steps. The resistive network includes a coarse relatively high impedance resistive string which is subdivided into 2.sup.x coarse segments. The resistive network also includes a fine relatively high impedance resistive network comprised of a fine resistive element per coarse segment. Each fine resistive element is then subdivided into 2.sup.(n-x) fine sub-segments. In determining the value of an input voltage being sensed, all the coarse segments are used to sense which coarse segments brackets the input voltage. However, only the fine segment in parallel with the "bracketing" coarse resistor is then coupled to comparator means to sense which fine sub-segment brackets the input voltage.

Abstract: A tendency towards uneven delays in raster scan lines is characteristic of known CCD imagers of line transfer type. This tendency arises owing to a line register being used for the time-division-multiplex selection of rows of charge packets sampling lines of image, and can be compensated to a degree by adjusting the onset of read-out of those rows. This tendency towards shear distortion of the television image is eliminated in the disclosed invention by replacing the line register with a charge funnel structure. The charge funnel is a CCD charge transfer channel, wide enough at its input to mate to the output ends of charge transfer channels in the imager register from which it receives charge packets in one or two rows at a time, and narrow enough at its output to increase the in-channel potential variations owing to charge packet transfer therethrough. This increase permits sensitive indications of charge level to be made by an electrometer. The electrometer (e.g.

Abstract: There is electrostatic coupling of the forward clocking signals used in a CCD imager of line transfer type to the underlying bulk semiconductor and then to the output charge sensing stage. Changes in forward clocking signal application during the line selection process in the image register tend to introduce transient disturbances leaving visible artifacts in television pictures reconstructed from the video signals generated from the CCD imager output signal samples. This tendency can be obviated in CCD imagers of line transfer type by introducing additional clocked delay to place the disturbances in the line retrace interval. The disturbances can then be removed from video signals by line retrace blanking.

Abstract: CCD imagers with pixels at least thirty microns long in the direction of charge transfer have their image registers forward clocked with at least five phases. The length of gate electrodes under which barrier are induced during image integration does not exceed the five to ten microns associated with acceptably low grain. Image integration takes place without applying voltages for inducing potential energy barrier to adjacent gate electrodes in the image register. These measures permit video signals with acceptably low grain to be obtained from these large-pixel images, solving a longstanding problem in the art.

Abstract: A cacade connection of a buried channel CCD clocked with clocking signals of a few volts and a floating-diffusion electrometer operated at voltages no larger than those few volts. Undesirable flow back of charge into the CCD from the electrometer is forestalled by applying to the last CCD charge transfer stage a clocking signal voltage developed by doubling the few-volt clocking signals applied to the earlier charge transfer stages of the CCD.

Abstract: Reduction of storage capacity required by one dimensional digital filter/decimator and/or expander/interpolation filter for spatially filtering that given dimension of a scanned two-dimensional image, represented by a temporal video signal, which is orthogonal to raster scan lines. Such filter devices are particularly suitable for use in Burt Pyramid image processing systems.

Abstract: Encoding apparatus, situated at the transmitter and employing digital processing, transforms an NTSC format color television signal to a serial time-multiplexed IYQY format which (1) preserves the blanking level of the NTSC signal, and (2) time compresses the color information in a manner which permits low-distortion restoration of the NTSC format color signal by decoding apparatus, situated at the receiver and employing digital processing. The transformed format is particularly suitable for communication over a DBS (direct-broadcast satellite).

Abstract: Two linear arrays of foamed dyestuff dispensing nozzles reciprocate 180.degree. out of phase normal to the path of a carpet web being dyed. Each array dispenses streams of foamed dyestuff over a gum coated web in alternate groups of first and second colors, the second array dispensing its dyestuff superimposed over the dyestuff dispensed by the first array. The same dyestuff color groups overlap in spaced repeating regions of the carpet web while different colors overlap in the remaining regions to provide a fully dyed web having the appearance of repetitive spaced regions of either the first or the second colors.

Abstract: The series connection between operating voltage terminals of the channels of field effect transistors with electrically alterable threshold voltage, programmed one for conduction and the other for non-conduction in response to programming voltage on their gate-to-gate connection, forms a programmable latch. A pair of such latches, or such a latch and a complementary-pair logic inverter, form a programmable complemented latch. The programmable complemented latch can be used to selectively enable a complementary-pair transmission gate, or to selectively enable a complementary-pair logic inverter, or to alternatively enable a transmission gate and a logic inverter. This last operation can be carried out, for example, in a modified Annis exclusive-OR gate configuration, for selectively inverting or not inverting a logic input.

Abstract: The loss of an AC supply voltage is detected by sensing the amplitude of the AC voltage relative to the reference potential about which it periodically goes positive and negative. Whenever the amplitude of the signal is below a given threshold, a sub-threshold signal is produced and its duration is sensed. If its duration is shorter than a predetermined sampling period, the sub-threshold signal is treated as a normally occurring signal and is filtered out of the system. If its duration exceeds the predetermined sampling period, it indicates that the AC voltage has remained "low" for too long a period of time, and an error signal is generated.

Abstract: An amplifying stage and a biasing stage for the amplifying stage, each include the same number and same types of IGFETs. The biasing stage components are interconnected to produce a control voltage which is a function of its components while being responsive to a reference level setting input voltage. The control voltage is applied to the amplifying stage which, when auto-zero'ed, functions as a voltage follower producing a voltage, at its input and output, which is substantially equal to the reference level applied to the biasing stage.

Abstract: Apparatus for deriving samples of transfer smear from a CCD imager of line transfer type and differentially combining them with video samples contaminated with transfer smear supplied from the same CCD imager, thereby to generate video signal samples in which transfer smear is suppressed.

Abstract: A first insulated-gate field-effect transistor (IGFET), responsive to an input voltage, supplies a current to a second IGFET when the input voltage exceeds the threshold voltage of the first IGFET. The second IGFET is connected in combination with a third IGFET, of complementary conductivity type, for sensing when the input voltage exceeds the sum of the threshold voltages of the second and third IGFETs. When that occurs, the third IGFET produces an output which is fed back to the first IGFET interrupting the flow of current between the first and second IGFETs.

Abstract: A pleated fabric is connected between an upper fixed sill and a movable sill. The movable sill is between the upper fixed sill and a lower fixed sill. Strings are resiliently secured to the sills and slidably frictionally engaged with the movable sill symmetrical relative to the sills. The friction engagement tends to keep the movable sill in place at whatever location the sill is moved regardless the blind orientation relative to gravity. A projection symmetrically located on the movable sill receives an apertured connector attached to a pole. The connector closely engages the projection and movable sill for remotely moving the movable sill parallel to an axis which is symmetrical to the friction load produced by the strings. The connector transmits a force vector from the pole to the movable sill symmetrical with respect to the friction load of the strings to avoid tilting the movable sill during its movement.

Abstract: In an interconnect .[.PABX.]., .Iadd.telephone equipment .Iaddend.which does not have an answer signal returned thereto, decision logic makes use of returned audible busy and ring-back signals to determine if a connection extended through a telephone utility network to a called station is completed.